Putting temp/prn work on a resume?

[trcy]

I am helping at an organization until they fill a full-time opening, so I am not sure how long they will need me. I basically want to list the job, but make it clear the reason the history is short is because of the temp nature of the job. I am also only there about once a week if that makes a difference. It is not through a temp agenecy and all of my searching online talks about listing it that way. Any ideas? TIA!!!

[Liziz]

Can you use "temp" or something like that when you list your position? I don't know what the job is, but for example, instead of listing "sales rep", list "sales rep (temp position)"? Or, try to fit it in by the date "May 2012-July 2012 (temp position)".